Question

The sum of three numbers is 75 . the third number is 2 times the first. the first number is 9 more than the second. what are the numbers?

Answer 1

25,5 , 16,5 and 33.
The original number is x.
So
(x+9) + x + 2x = 75
4x + 9 = 75
4x = 66
x = 16,5

Lets see if its right.
25,5 + 16,5 + 33
= 42 + 33
= 75

;)